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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/108752] New: word_mode vectorization is pessimized by hard limit on nunits Date: Fri, 10 Feb 2023 11:24:30 +0000 [thread overview] Message-ID: <bug-108752-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108752 Bug ID: 108752 Summary: word_mode vectorization is pessimized by hard limit on nunits Product: gcc Version: 13.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization Assignee: unassigned at gcc dot gnu.org Reporter: rguenth at gcc dot gnu.org Target Milestone: --- r13-5771-gdc87e1391c55c6 re-introduced a hard nunits limit to the vectorizer when using emulated vectors (aka word_mode vectorization). That's because this feature relies on vector lowering to implement plus, minus and negate with bit operations and that has such limit in place for when dealing with user written code that didn't have any cost modeling applied. The fix is to emit supported operations from the vectorizer.
next reply other threads:[~2023-02-10 11:24 UTC|newest] Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-02-10 11:24 rguenth at gcc dot gnu.org [this message] 2023-02-10 11:24 ` [Bug tree-optimization/108752] " rguenth at gcc dot gnu.org 2023-02-10 12:12 ` rguenth at gcc dot gnu.org 2023-02-12 23:49 ` hp at gcc dot gnu.org 2023-04-28 9:07 ` cvs-commit at gcc dot gnu.org 2023-04-28 9:08 ` rguenth at gcc dot gnu.org 2023-05-23 16:10 ` cvs-commit at gcc dot gnu.org
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